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Porous materials allow sound energy to easily enter and the low frequencies pass through material much easier than the high frequencies.
Journal of Science and Technology (2013), 4(2), pp. 23-33
Seddeq, Factors influencing acoustics performance of sound absorptive materials.
Australian journal of basic and applied sciences, 3(4) (2009), pp. 4610-4617
Journal of applied polymer science 119.6 (2011), pp. 3696-3707

Processing of Materials by Electric Discharge Assisted Mechanical Milling.
This presentation provides an overview of recent developments in the EDAMM method and its application to rapid materials processing, and the synthesis of certain functional materials.
Dunne, Journal of Metastable and Nanocrystalline Materials, 26 (2005) pp. 16-21 15.
Stanford, Journal of Alloys and Compounds, -in press 16.
Ding, Materials Letters 59 (2005) 985.

Journal of Materials Science: Materials in Medicine 21(4): 1109-1120
Dental Materials, 2008. 24(3): p. 299-307
Journal of Materials Science: Materials in Medicine 16(4): 341-345
Journal of Materials Science Letters, 2001. 20(18): p. 1719-1722
Materials Science and Engineering: C, 2002. 20(1-2): p. 187-193

The paper deals with the numerical analysis of foam materials.
Journal of Petroleum Science and Engineering, Vol. 43, (2004), p. 129137
Journal of Colloid and Interface Science, Vol. 181, (1996), p. 511-520
Materials Science and Engineering A, Vol. 272, (1999), p. 120-133
Materials Science and Engineering A, Vol. 407, (2005), p. 11-23

Neo: Journal of Materials Processing Technology, Vol. 209 (2009), p. 4459–4464 [4] N.
Loh: Journal of Materials Processing Technology, Vol. 190 (2007), p. 181 – 188 [11] Y.
Silberschmidt: Computational Materials Science, Vol. 28 (2003), p. 645–653 [13] S.
Nategh, et al: Journal of materials processing technology, Vol. 201 (2008), p. 43 – 47 [14] K.
Fang, et al: Journal of materials processing technology, Vol. 195 (2008), p. 204 – 211 [15] X.

On early properties of high performance spray material Yuezhong LIN Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation (Shandong University of Science and Technology) Qingdao China 266590 Jcssust0@163.com Keywords: high performance spray material mechanical properties Abstract: This text used double fast cement, and fly ash, and high performance polymer and fiber for main material and plus agent for has high performance spray material of preparation and research, by distribution out of material has following advantages: condensation time fast, and short-term and late strength high, and dry shrink volume minimal, and stick poly sexual strong, and waterproof, and back bomb rate small, and seal performance very good, and has must of flexible, and using range wide.
Spray materials with high mechanical degree, fast construction period, savings in manpower and so on.
But existing spray material has the following disadvantages: Early strength low and late strength spray material, needs to support the low utilization rate of the template, and material content; Chinese paste material features a single, does not have a waterproof, crack resistant and flexible; Spray materials poor cohesion, with a resilient material, seriously affect spray quality and spray more often [3]; Spray materials short life, susceptible to deformation of coal and rock and fission occurs, causing cracking and secondary rocks into the air; Spray materials using small range.
Original materials Cement: double fast cement.
This research programmer is feasible, preparation of materials to meet the needs of engineering, can be used in coal mine roadway reinforcement and blocking.

Molybdenum is also studied as a metallic component of ceramic materials [4-8].
Technology and research methods The manufacturing technology of the cermet materials can be divided into following stages: the preparation of the mass from raw materials, moulding, drying, and firing.
Kohtoku, Journal of Materials Science 32, 4549 (1997)
Labbe, Journal of Materials Science 32, 3829 (1997)
Zinkle , Journal of Nuclear Materials 366, 369 (2007)

The LiFe0.95Bi0.05PO4/C phase exhibited superior cell performance among the materials prepared.
Chemistry of Materials, 17(20) (2005), 5085-5092
Journal of Power Sources, 148(3) (2001), 498-502
Journal of Power Sources, 189(1) (2009), 440-444
Materials Research Bulletin, 42(11) (2007), 1942-1948

Introduction Metallic materials have electromagnetism characteristics and their changes in electromagnetism properties can reflect objects under test, such as type of material, geometry and quality [1-3].
Electromagnetic induction detection techniques can be used to obtain the conductivity and permeability of materials and have hence been widely used in detection of conducting materials.
Some tests will be carried out on specimens of different materials and with different cracks in the future.
Peyton, “A multi-frequency impedance analyzing instrument for eddy current testing,” Measurement Science and Technology, vol. 17, pp. 393-402, 2006
Peyton, “A planar EMT system for the detection of faults on thin metallic plates,” Measurement Science and Technology, vol. 17, pp. 2130-2135, 2006.

In the DPST (Direct Prototype Spray Tooling) sprayed directly prototype tooling technology of Huazhong University of Science and Technology , due to brittle characteristics of ceramic materials, there was low efficient in the processing of large mold .The study would obtain sprayed ceramic prototypes through Industrial robots directly milling of ceramic rough technology, However, clay ceramic prototype embryos after milling would occur large shrinkage in the high-temperature drying and consolidation.
Introduction Due to ceramic materials was hard and brittle, this characteristics is much more difficult to machine than metal materials.
In this study, the ceramic materials of prototype used clay that it comes from Zhongxiang City, Hubei Province, China.
Acknowledgements This paper is supported by the national natural science fund project (51065008) and Jiangxi Province Education Department research project (GJJ11103).
[4] Li-Zhi Zhang,in: Coupled heat and mass transfer through asymmetric porous membranes with finger-like macrovoids structure, International Journal of Heat and Mass Transfer, 52 (2009),pp. 751–759